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Abstract
This study was conducted to evaluate the use of carbon dioxide laser in surgical treatment of periapical lesions.
A total of thirty patients-males and females – were included in this study, their ages ranged between 20-30 years.
Any of them should be healthy, not suffering any systemic illness, having a radiographically evident periapical radiolucency related to either mandibular or maxillary anterior regions.
The patients were divided into two groups the first group (group one) which include 15 patients were treated with conventional periapical surgery. while the second group (group two) which include 15 patients was treated using Co2 laser.
Both groups are evaluated radiographically for six months (with one month and three months follow up intervals).
The Digora software was used to measure the bone density for each case in both groups. The bone density was measured at three different zones which are
1- C (cavity) zone within the pathological defect.
2- B (bone) zone in healthy bone surrounding the pathological defect.
3- L (line) line of interfacing between C and B.
The results of the this study revealed a sustained increase in bone density in the two different groups. The remarkable increase in percentage density for group two (lased) over that in group one (unlased) appeared at the apical area as it was 20% after one month, 41% after three months and 72% after six months postoperative.
from the Results of the current work it could be concluded that:
1. Removal of periapical lesions could be achieved by using Co2 laser which cause vaporization and shrinkage that facilitates complete removal of the pathological tissues.
2. The rational for Co2 laser in periapical surgery therefore includes: improved hemostasis, and concurrent visualization of the operative field, sterilization of the pathological cavity and contaminated root apex as well as reduction of post operative pain.
3. To avoid any thermal effect of laser on bone, application of short impulses (2-3 seconds) and a power not exceeding 4-5 watts with copious irrigation is recommended.